Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s10040-010-0644-7 |
Determining groundwater degradation from irrigation in desert-marginal northern China | |
O Dochartaigh, Brighid E.1; MacDonald, Alan M.1; Darling, William G.2; Hughes, Andrew G.3; Li, Jin X.4; Shi, Li A.5 | |
通讯作者 | O Dochartaigh, Brighid E. |
来源期刊 | HYDROGEOLOGY JOURNAL
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ISSN | 1431-2174 |
EISSN | 1435-0157 |
出版年 | 2010 |
卷号 | 18期号:8页码:1939-1952 |
英文摘要 | Groundwater degradation from irrigated agriculture is of concern in semi-arid northern China. Data-scarcity often means the causes and extent of problems are not fully understood. An irrigated area in Inner Mongolia was studied, where abstraction from an unconfined Quaternary aquifer has increased threefold over 20 years to 20 million m(3)/year; groundwater levels are falling at up to 0.5 m/year; and groundwater is increasingly mineralised (TDS increase from 400 to 700-1,900 mg/L), with nitrate concentrations up to 137 mg/L N. Residence-time (chlorofluorocarbons), stable-isotope and hydrogeochemical indicators helped develop a conceptual model of groundwater system evolution, demonstrating a direct relationship between modern water proportion and the degree of groundwater mineralisation, indicating that irrigation-water recycling is reducing groundwater quality. The investigations suggest that before irrigation development, active recharge to the aquifer from wadis significantly exceeded groundwater inflow from nearby mountains, previously held to be the main groundwater input. Away from active wadis, groundwater is older with a probable pre-Holocene component. Proof-of-concept groundwater modelling supports geochemical evidence, indicating the importance of wadi recharge and irrigation return flows. Engineering works protecting the irrigated area from flooding have reduced good quality recharge; active recharge is now dominated by irrigation returns, which are degrading the aquifer. |
英文关键词 | Arid regions Irrigation Groundwater age Hydrochemistry China |
类型 | Article |
语种 | 英语 |
国家 | Scotland ; England ; Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000284599200014 |
WOS关键词 | NORTHWESTERN CHINA ; AQUIFER ; PLAIN ; SYSTEM ; BASIN ; RESOURCES ; RECHARGE ; FLOW |
WOS类目 | Geosciences, Multidisciplinary ; Water Resources |
WOS研究方向 | Geology ; Water Resources |
来源机构 | 中国科学院西北生态环境资源研究院 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/164495 |
作者单位 | 1.British Geol Survey, Edinburgh EH9 3LA, Midlothian, Scotland; 2.British Geol Survey, Wallingford OX10 8BB, Oxon, England; 3.British Geol Survey, Kingsley Dunham Ctr, Keyworth NG12 5GG, Notts, England; 4.Cold & Arid Reg Environm & Engn Res Inst, Div Hydrol & Water Land Resources, Lanzhou 730000, Gansu, Peoples R China; 5.Alxa League AusAID Project Management Off, Bayanhot 750306, Inner Mongolia, Peoples R China |
推荐引用方式 GB/T 7714 | O Dochartaigh, Brighid E.,MacDonald, Alan M.,Darling, William G.,et al. Determining groundwater degradation from irrigation in desert-marginal northern China[J]. 中国科学院西北生态环境资源研究院,2010,18(8):1939-1952. |
APA | O Dochartaigh, Brighid E.,MacDonald, Alan M.,Darling, William G.,Hughes, Andrew G.,Li, Jin X.,&Shi, Li A..(2010).Determining groundwater degradation from irrigation in desert-marginal northern China.HYDROGEOLOGY JOURNAL,18(8),1939-1952. |
MLA | O Dochartaigh, Brighid E.,et al."Determining groundwater degradation from irrigation in desert-marginal northern China".HYDROGEOLOGY JOURNAL 18.8(2010):1939-1952. |
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